The Sysbench version used was 0.4.12, and the read-only runs were invoked with the following command:
sysbench --max-time=300 --max-requests=0 --test=oltp --oltp-dist-type=special --oltp-table-size=10000000 \\ --oltp-read-only=on --num-threads=[NO_THREADS] run
The "oltp-read-only=on" parameter was omitted for the read-write tests. The my.cnf file listed in my previous blog was also used unchanged for these tests.
Here are the results graphically running on Linux.